CVE-2026-27356 PUBLISHED

WordPress MC4WP plugin <= 4.14.1 - Broken Access Control vulnerability

Assigner: Patchstack
Reserved: 19.02.2026 Published: 06.11.2026 Updated: 07.11.2026

Missing Authorization vulnerability in ibericode MC4WP mailchimp-for-wp allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects MC4WP: from n/a through 4.14.1.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	ibericode
Product	MC4WP
Versions	Default: unaffected affected from 0 to 4.14.1 (incl.)

Solutions

Update the WordPress MC4WP plugin to the latest available version (at least 4.15.0).

Credits

Harry Nguyen | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/mailchimp-for-wp/vulnerability/wordpress-mc4wp-plugin-4-14-1-broken-access-control-vulnerability?_s_id=cve

Problem Types

Missing Authorization CWE

Impacts

Exploiting Incorrectly Configured Access Control Security Levels